On Fri, 17 Jun 2005, Admar Schoonen wrote:
On Fri, Jun 17, 2005 at 12:36:49PM +0200, Olivier BERT wrote:
I'm sorry to post many messages but I have have another problem.
It concerns IDE devices. My Debian is installed now but when copy large
files for example or when I make several disk operations at the same
time,
errors appears in my file system. For example, some null characters
appear
in some files.
I am about to think that it is a DMA problem. But my knowledge
concerning
hardware is a bit limited.
- Is it an hardware problem ?
- may be a problem of connections between the disk and the IDE bus on
the
moter board ?
- is it a software or hardware problem ?
I don't know. I never noticed any problems with my 20 GB and 120 GB
drives (both
seagate fwiw) in my blade 100; not with Solaris 8 neither with Linux
2.6.x
(using ufs in Solaris and ext3 in Linux). I never did any tricks with
hdparm to
set the DMA level or something.
Things that come to mind:
- do you use a proper cable? I'm not sure if it's an ATA66 or ATA100
controller
in the blade 100, so I use an ATA100 cable to connect the 120 GB
drive (20 GB
still uses the default cable that came with the box). I'm not sure if
ATA66
and ATA100 cables differ, but for at least ATA100 it is required that
every
signal wire has it's own ground wire iirc (thus, a 40 pin cable has
actually
80 wires).
- what filesystem do you use? I've read somewhere that there could be
problems
with Reiserfs on sparc, though I don't know any details.
Admar
There is also a strange thing. In my dmesg, as in hdparm, my hard disk
is seen as a 40GB. But I am nearly sure that it is a 20GB (as detected
in fdisk) and as it is written on the internet.
I attach the output of my hdparm -I.
What is the real size of my disk ?
--
Olivier BERT
e-mail: obert01@mistigri.org
------------------------------------------------------------------------
/dev/hda:
ATA device, with non-removable media
Model Number: WDC WD400BB-23DEA0
Serial Number: WD-WMAD1E447435
Firmware Revision: 05.03E05
Standards:
Supported: 5 4 3 2
Likely used: 6
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 78165360
device size with M = 1024*1024: 38166 MBytes
device size with M = 1000*1000: 40020 MBytes (40 GB)
Capabilities:
LBA, IORDY(can be disabled)
bytes avail on r/w long: 40 Queue depth: 1
Standby timer values: spec'd by Standard, with device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Recommended acoustic management value: 128, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4 udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* READ BUFFER cmd
* WRITE BUFFER cmd
* Host Protected Area feature set
* Look-ahead
Write cache
* Power Management feature set
Security Mode feature set
* SMART feature set
* Device Configuration Overlay feature set
Automatic Acoustic Management feature set
SET MAX security extension
* DOWNLOAD MICROCODE cmd
* SMART self-test
* SMART error logging
Security:
supported
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
HW reset results:
CBLID- above Vih
Device num = 0 determined by CSEL
Checksum: correct